Yonhap, the South Korean news agency, citing unnamed intelligence sources, said that the plane appeared to be a Soviet-era military jet and that the pilot might have been trying to defect.
This paper develops a set of barycentre of plane automat Ed control system based on industrial personal computer and programmable logic controller aiming at the defect of avionics in our country.
Method of calculation of defect site by ultrasonic inspection of indined plane welding has been described in detail, and formula have also been proved.